It's like you were already answering your own question, by the way. However, let me quickly chip in something I read CZ Binance said about crypto. He said the best way to be wealthy in crypto is to hodl it. If someone heDl a single Bitcoin since 2015 and never sold it, the person would be in great wealth, no doubt, unlike if they tried to trade it (which most do and then lose out on it). I share in CZ's view point and this is why I'm of the opinion that hodling is also a form of trading. But it's also pertinent to note that when one hodls one should know the right time to sell.
Nevertheless, to grow wealth will mean investing and reinvesting. Then lead a minimal life of luxury so as to safe cash too.
Keeping coins is really the right thing to do. It's just that you don't always know exactly which ones will rise in price. For example, I received tokens from one bounty and my intuition told me that the project would be in demand. But at one point I urgently needed money and I sold it. As a result, I sold it for $ 150. At the moment, the price is estimated at 12,000.